Mold for hollow articles.



E. KERR & J. SMITH.

MOLD FOR HOLLOW ARTICLES.

APPLICATION FILED SEPT, 1,-1908. 918,328, Patented'Apr. 13, 1909.

6 SHEETS-SHEET 1.

WITNESSES:

I I mvsmonb Att ys I Patented A 1909. ETs-SHEnT 2 INVE S WITN EQKERR &J. SMITH.

MOLD FOR HOLLOW ARTICLES.

APPLICATION FILED SEPT. 1.190s.

Patented Apr. 13, 1909.

5 SHBETSSHEEI 3.

z I I INVENTORS V IITNESSES E. KERR & J. SMITH. MOIZD FOR HOLLOWARTICLES.

APPLICATION FILED SEPT. 1,1908.

Patented Apr. 13, 1909.

5 SHEETS-SHEET 4.

w wn

FIB-'7.

Fl'llB INVENTOR'S E. KERR & J. SMITH. MOLD FOR EOLLOW ARTICLES.

AP'BLEGATIONI FILED SEPT,1,1908.

Patented Apr. 13, 1909.

5 SHEETS-SHEET 5 FIG FIG. 1B

WITNESSES:

UNITED STATES PATENT OFFICE.

' nnwasn KERR AND JAMES SMITH, OF PITTSBURG, PENNsYLvAN'iA. i

' morn FOB sorrow renews.-

Q ms. 918,328..

Specification of Letters Patent.-

Patented A ril 13, 1909.

To all whom it may concern:

' Be it known that we, EDWARD KERR and JAMES SMITH, residing atPittsburg,-in the county of Allegheny and State of Pennsyl venia,"citizens of'the United States, have iritented or discovered certain newand useful Improvements in Molds for Hollow Articles, ofwhich'improvements the'follow- Y is a specification.

he invention described herein relates to certain im rovenrents in theformation of molds for lQllOW annular articles such as i t er boxes,coolers, etc.

he invention is hereinafter more fully 16 described andclaimed.

In the accompanying drawings forming a part of this specification Fi ure1 is a sec-v tional elevation of a comp eted mold for twyer box. Fig. 2is a plan view of matrix cF'losing plate and annular core support.

1 erent lanes of the parts employed for forming ft e annular core, Fig.5 is a plan view of plate employed in forming' the annular core andshowing the core anchors and thickness rings in place thereon; 6 is aplan view of the stripper'plate for' the interior or green sand core;'Fig.7 is: a sec-.

' tional View of the parts employed. in forming the interior or greensand core, Fig. 8 is a .sectionaL elevation showing the manner offorming the main mold, Fig. 9 is a sectional elevation of acomfpletedmold showin the cores. suspended roni the closing p ate;

Figs. 10 and" 11 are sectional-view of the. plates showfliin Figs. 5 and6. The mold consists as shown, in Fig. 1 of -the main mold or flask 1 inwhich the entire matrix is formed, the core 2 formin the 4'0 cavity inthe annular body to'be' forine ,the

, interior core 3 and the matrix closing and coresnpportin'g plate 4.:The formation of ,thccores in the order mentioned and the' mainmold'will be separately described. y H Informing the annular core 2, apattern ("Tiblock 5 offthe desired shape and size is pro er-Iycenteredon a mold board 6 having gui e pins 6%. A stripping late 7having an open-* of a diameter a ittle greater thanthe 16" largestdiameter of the pattern block] is (r named board around the attemguidedto position t e or outer end of the twyer box.

. 3 and '4 are sectional elevations in.

a passing through holesin the plate. The

shoes 8 the ventilating-j and anchormg rods 9 are next plac dinpgosition in radially" arrangediseats 10 on the stripping plate, asshown in Figs. 4-and 5. In or er to prevent metal'frorn adhering to theunprotected portions of the rods 9, the portlons thereof adjacent to theshoes are covered with some resisting material as asbestos paper. Ringsections 11, are next placed around the pattern block, the sectionsbeing slotted for the. rece tion of the anchor rods andbeing suppoite bythe shoes 8 as shown in Figs. 8,. 4 and '5. These'sections which areremoved as hereinafter described, deteri mine the thickness of the metalat the large The core box 12 which may be made in sections as shown, isthen placed in position. -"Material suitable for abaked core is thenlacked in the space between the pattern bloc fzpidcore' box y anysuitable means as for exam lo ajarringmachine, in which case a ham 'ingframe 13' is placed on the core boz'gand clamped down to the bed 6' ofthe 'arring machine, therebyholding the several parts described inposition. The board 6 may be the bed of a molding machine, or the usualmold board when the parts are formed by hand. After the corehas beenformed, the

tion' 0 the central or green sand core 3,

which is supported and ventilated by a 'tubu-f lar core bar '15. Thiscore bar is securedin a1 The' next step 1 centrally located opening intheiplate 4, and f a strip ing plate I6is' p cell on the plate .4 arounthe core bar. The plates 4 and'lfi are provided with holes for thereception of the gnide'pins 6} on the mold board or bed 6. The stripin'g platcf 16 "is provided witnrim or bead- 1 ads ted to extend into agroove in the low r-en of the camper '18 and with ,bloek s, N ol-repaling toithf'e shoess end seats at seas ara, a

The engagements of the blocks 19 with the seats 20' msures the propercentering of the core box on the plate4. The lower end orv point a ofthe core is formed in a circular re-i.

, .cess-21 in the plate '4 as clearly shown in Fig."

11' and forms a portion of the model matrixas shown in Figs. 1 and 9;'Afterithe sand has been properly tamped-in thfe jfcorebox (if desiredsuch tamping can be done in a .jarring machine as indicated 7) the plate16 is lifted stripping the COI'Q'bOX from the core 3, and the plate 4with the core in position thereon is placed on the board 22 providedwith guide pins 23 for properly centering the different parts of themold, said pins passing through holes 24 in theplate 4.

In forming the main matrix the core box 18 may be used as pattern, or aseparate pattern may be used. When the core box is used for a pattern asshown in Fig; 8, its upper end is closedby a disk 25, which is providedwith athreaded stem 26' extending down through a pattern late 27. Thepattern is properly centers on theplate by a' rib- 28 projecting into agroove in the end of pins 6, the pattern and stripping 'lates' and theflask being provided wit reception of the pins.

The sand can be packed on the flask around the pattern in any suitablemanner, as for example by a jarring machine :ji'n' which case theseveralparts mentioned are clamped to the bed of:

the machine by abanking frame 13, as here:

tofore described. After the completion of the mold, the banking frame isremoved, and the mold is strippedfrom the pattern by lifting the late30.

Before p acing the mold 1 on the plate 4; the core 2 is placed inposition around the green sand core 3 the position of the core 2 beingdetermined by the seats 20 into which the shoes 8 on the rods 9 enterafter the core 2 has been placed in position, the portion 1 of themold-is lowered down over the cores being guidedl to properposition-onthe plate 4 by pins 23- passing through holes 1n lugs 33on-the flask 31,11, "It will be observed that the matrix for theformation of the article is wholly with a single flask and that thematrix is formed with one end closed while the'opposite end of thematrix is closed by the plate 4 which also supports the several cores.When the cores and mold are placed together asshown flask, the core 3 hoes for the supported by the shoes, and a parts, when; lowering the -moldover" the cores; The number and arrangement of varied to suit retheseguide pins will be quirements, the larger the mold the more pins will beemployed. o

As shown in Fig. 9' the mold '1 can-be placed'open-end up in the castingfloor and the core 2 placed in position its shoes 8 resting on the end'of the flask. The plate '4 having the core 3 firmly secured thereto isthen turned over so that the core will be suspended from the plate, andlowered onto the eing centered by the ins 34 on the flask enteringholes24 on the p ate and also by the shoes 8 entering the seats 20.

It is characteristic of our invention that the several parts of thecompleted mold, 'i. e., the annular core, the central core and the mainmatrix or mold are separately formed onindependent plates each of whichis provided with corresponding guide elements and with means. to insurethat'the mold element formed on each plate shall have a predetermlnedposition relative to the guide element of such plate. It will beobserved that-the central core is formed on the plate 4 which in the comleted mold forms, the

drag as in Fig. 1 or t e copeas in Fig. 9 one end of said core fitting ma recess in said plate which is also provided with seats for properlylocating the annular core with reference to the central core and thatsuitable guiding means are employedon the plate and flask to insure theproper adjustment of the main matrix relative to .the annular core. Bysupporting the cores on a rigid metal plate having means insuring theroper rela- -tive positions of the cores an the main matrix-relative tothe cores, the formation of defective castings due to the shifting ofone of the shaping elements is reduced to a minimum.

N0 cla1m 1s .made herein for the mold shown and described as the'samewillform I the subject-matter of an application to be filed in due-time.

We claim hereinas our invention:

1. The combination 'of a board, a core pattern supported by the board, aplate resting on themold board around the pattern and provided withradially 'arrangedseats, an'

choring rods provided with shoes fitting in said seats, a thickness, rmgformed 1n sections and arranged around the pattern and ported by'theplate. r I

' 2. As' a means for forming molds the combination of a mold boardprovided with guide pins, plates for the formation of cores and mainmatrix provided with holes for the reception of said pins, a flask alsoprovided core box supwith guide holes, said plat-es being provided intestimony whereof, we have hereunto Wlth means for supportmg the shapmgparts set our ha 11 (1s.

m proper relatlon to the gulde holes. EDWARD KERR.

-3.' The combination of a board having :1 JAMES SMITH. '5-p1ura11ty ofgulde pms, a core supportmgj Wmnesses:

plate and a flask each havmg hules corre- 1 CHARLES BARXETT,

sponding in position to the guide pins. Fmx'crs J. Tomxssox.

